Put the couscous and chicken in a medium bowl; pour 1 cup of the hot cooking liquid on top. Stir, then cover tightly with plastic wrap and let sit 5 minutes. Fluff the couscous with a fork.

Meanwhile, melt the butter in a medium skillet over medium-high heat. Add the almonds, raisins, scallions and the remaining 1/4 teaspoon cinnamon. Cook, stirring, until the nuts are toasted, 2 to 3 minutes. Stir in the cilantro.

Divide the couscous and chicken among bowls. Top with the carrots and more of the cooking liquid. Sprinkle with the almond mixture and more cilantro. Top with yogurt and/or harissa.